Responsivity mobile

Hi ! I've just try the mobile version of the website and it seem i can't get an open menu for knowing wich icon is for wich category. 2nd point when i try to add a sound for Channel points use, it open a window for select the sound to add but the window is stuck on the left and the 1/2 is missing so i can't choose first column sound for add. I hope it can help u to improve the webstite responsivity :).